Orthodontic



E. H. ANGLE.

ORIHODONTIC APPLIANCE. APPLICATION FILED Nov. 28. l9l6.

E ,32 99% Patented Nov. 25, 1919.

EDWARD H. ANGLE, 0F PASADENA, CALIFORNIA.

ORTHODONTIC APPLIANCE.

Specification of Letters Patent.

Patented Nov. 25, 1919.

Application filed November 28, 1916. Serial No. 133,854.

To all whom it may concern:

Be it known that I, EDWARD l-l. i-iivcnn, a citizen of the UnitedStates, and a resident of Pasadena, in the county of Los Angeles, Stateof California, have invented certain new and useful Improvements inOrthodontic Appliances, of which the following is a specification,reference being had to the accompanying drawings.

My invention relates particularly to the means of attachment of thearch-bar with the tooth engaging bands, and is especially directed tothe connection between the archbar and the terminal anchorages.

The principal objects of my invention are, to provide terminalanchorages so constructed and arranged to not only afford a rigidconnection with the arch-bar, but which permits said arch-bar to bereadily connected with the anchorages and as quickly released therefrom.

Other objects of my invention are, to so simplify the connection betweenthe archbar and terminal anchorages as to both reduce the cost ofmanufacture and materially lessen the discomfort to the wearer.

Specifically stated, the form of my invention as hereinafter describedcomprehends a terminal anchorage comprising a tubular sheath having akeyway, and an arch-bar provided with a keyway extended transverselythereof and arranged to register with the keyway in said tubular holder,and to receive a key for rigidly locking the terminal anchorage andarch-bar together.

My invention also includes all of the various novel features ofconstruction and arrangement as hereinafter more definitely specified.

In the accompanying drawings, Figure 1 is a plan View of a convenientembodiment of my invention as applied to a lower molar serving as ananchorage abutment; Fig. 2 is a side elevational view of the structureshown in Fig. 1 as applied to said molar; Fig. 3 is an enlargedfragmentary sectional view taken on the line 3-3 in Fig. 1; Fig. 4 is anenlarged perspective view of a fragment of the arch-bar, showing thekeyway therein; Fig. 5 is a plan view of a modification of the form ofmy invention shown in Figs. 1 and 2; Fig. 6 is a side elevational viewof the structure shown in Fig. 5; Fig. 7 is an enlarged fragmentarysectional viewtaken on the line 77 in Fig. 5; and Fig. 8 is an enlargedfragmentary perspective view of the arch-bar adapted to be employed inconnection with the anchorage illustrated in Figs. 5' and 6.

In said figures, the anchor-hand 1 is arran ed to be attached to a molartooth as indicated in Figs. 1 and 2, by the adjusting nut 3, which isrotatably mounted on the threaded stem 4 projecting from one end of saidanchor-band 1, and extends through the eye 5 on the opposite end of saidanchor-band, whereby the ends of the anchor-band may be drawn togetherto clamp it upon said molar.

As illustrated in Figs. 1, 2 and 3, the tooth-band 1 isprovided with theanchor tube 6 which may be of any desired form, preferably rectangularas shown, to form a sheath for the reception of the end of the arch-bar9, which. best shown in Fig. i, is provided in close proximity to itsends with a transversely extended keyway 10.

The keyway 10 is arranged to register with alined apertures 12 and 13 inthe upper and lower walls of the sheath or tube 6, forming a keyway,through which apertures and keyway a suitably formed key 15 may beextended to Prevent the accidental withdrawal of said arch-bar from saidtube.

While the key 15 may be of any de sired form, I have chosen toillustrate a key having an overhanging head 16, and having its oppositeend capable of being bent laterally, as shown at 17 in Fig. 3..

Although I have shown but one keyway in the arch-bar 9, it is to beunderstood that as many of such keyways as may be desired for thelongitudinal adjustment of the archbar may be provided.

In the form of my invention illustrated in Figs. 5 to 8, inclusive, thetooth-band'20 is provided with the anchor tube 21, forming a sheathextending parallel with the aXis of said tooth-band, and arranged toreceive the late-rally extended projection 22 form ing the end of thearch-bar 23 and having the transverse keyway 25, as best shown in Fig.8.

The keyway 25 is arranged to register with the alined apertures 26 and27 in the opposite walls of said sheath or tube 21, forming a keyway,through which apertures and keyway the key 29 may be extended to preventthe accidental displacement of the arch-bar from said tube.

Although the arch-bar 23 may have its end bent laterally to form theprojection 92,

said projection may preferably extend from the arch-bar at' a positionapproximating the end of said arch-bar, to provide a slight overhang 30,as shown in Figs.'6 and 8, and thereby afford a more stable support/uponthe end ofthe sheath. r

It will be obvious that the anchorage structures herein disclosed notonly afford a rigid abutment for the arch-bar, but provide for its readyattachment and removal.

I do not desire to limit my invention to the precise details ofconstruction and arrangement as herein set forth, as it is ob vious thatvarious modifications may be 7 made therein Without departing from theesvided With a transversely extending keyway,

and an arch-bar adapted to be received in saidsheath and having a keywayarranged to register With the keyway in said sheath and be keyedthereto.

3. An orthodontic appliance comprising a tubular anchor sheath arrangedin parallel.

relation with the axis ofthe tooth to which it may be applied, andhaving'a keyWay.

comprising alined' apertures in the opposite Walls of sald sheath.

4. A11 orthodontic appliance comprising an anchor sheath arranged inparallel relation With'the axis of the tooth to which it may be appliedand having a keyway extendlng transversely thereoi and an archbar havingits end portionextendechlatenally and having a transversely extendingkeyWay therein arranged to register with the keyway in said sheath.

5.72m orthodontic appliance comprising i an arch-bar having its endportion angue larly extended and provided with a transversely extendingslot in the lateral exten, sion. 1 a V 6. An orthodontic appliancecomprising an arch-bar having its end portion angularly extended andprovided With a transversely extending slot in the lateral extension,and having, an extension projecting tion. 7

In Witness whereof I have hereunto set my hand this 20th day ofNovember, An l) 1916. J v

EDWARD n: ANGLE. Witnesses: Y 7

. M. FAY, V. M. MORGAN.

slightly beyond said laterally extended por- V

